Plenty of publicly available resources to get more info about real estate.  In cook county try

http://cookcountyassessor.com - property photo, general info on the property including PIN

http://cookcountytreasurer.com - property owner and tax info

http://www.ccrd.info/CCRD/il031/index.jsp - history of legal filings related to the property such as mortgages, liens, deeds, etc (you need PIN to access info)